This is an old moc that it seems i haven;t uploaded. If you like leave a comment. Anyway, He was a scientist that altered his own self and attached tanks to his back he breathes through his helmet with the air from his home planet. And everybody his mask isn't a mask it's a helmet that is supposed to give the impression that he has a hat type thing the head, the av-matoran head is supposed to be his actual face. he breathes through the tubes that I put into the bottom or back of the head so it looked like he's breathing the alien air in:)